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P38A Oil

Discussion in 'Range Rover' started by oakey, May 30, 2020.

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  1. oakey

    oakey Well-Known Member

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    Possibly a silly question, but what does too much oil in gearbox or engine do?
    How much is too much?
    How accurate are dipsticks?

    Thank you for helping but just a thought I had
     
  2. kermit_rr

    kermit_rr Well-Known Member

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    In the engine, crank seals can blow, oil can push past pistons etc, not something you want
    Gearbox overfill can't be much better
     
  3. oakey

    oakey Well-Known Member

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    Ok ta
    How much is too much?
    If I overfill by 1/4 inch on dipstick is that too much?
    I havent by the way
     
  4. kermit_rr

    kermit_rr Well-Known Member

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    That sounds like quite a bit over to me, i wouldn't go more than a few mm over, personally
     
  5. Henry_b

    Henry_b Rover V8 Powered

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    Drain some out into a CLEAN jug..

    That way if you drain too much you can put the correct amount back in..
     
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  6. kermit_rr

    kermit_rr Well-Known Member

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    Good in theory, but as soon as you put clean oil in any kind of container, muck manages to get in, not sure where from though
     
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  7. Henry_b

    Henry_b Rover V8 Powered

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    Usually as you fumble around... ;)
     
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  8. kermit_rr

    kermit_rr Well-Known Member

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    Pervert
     
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  9. oakey

    oakey Well-Known Member

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    Ok so it does have to be pretty accurate then
     
  10. Henry_b

    Henry_b Rover V8 Powered

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    I've had mine a tad over the mark without issue but there is a min and max there for a reason ;)
     
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  11. oakey

    oakey Well-Known Member

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    True
    Are dipsticks that accurate?
     
  12. Henry_b

    Henry_b Rover V8 Powered

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    I'd say they're good enough ;)

    When my oil gets low i just buy a longer one ;)
     
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  13. oakey

    oakey Well-Known Member

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    Sounds like a plan :)
    And thank you
     
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  14. Marshall8hp

    Marshall8hp Member

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    1/4" will be around 250ml, or about 4% of a full fill. It isn't going to make any difference.
     
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  15. Grrrrrr

    Grrrrrr Jedwood Spannerhands

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    I'd go along with that, especially on an old engine that's a bit tired. I had a mate who chucked way too much oil in an old Astra and it just smoked for a few thousand miles until it burnt the excess off.
     
  16. kermit_rr

    kermit_rr Well-Known Member

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    That's all well and good, but you won't get away with that of you have catalytic converters, the oil will kill them
     
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  17. dubbleRR

    dubbleRR Well-Known Member

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    1/4 of an inch might be 1/2 an inch when hot :eek:.........RR.
     
  18. wammers

    wammers STILL BREATHING. Donater

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    If you are changing oil and filter. Warm engine drain old oil. Change filter. Fill to max mark. Start and run engine until oil lamp goes out, switch off. Top up to max mark. Oil is checked with engine cold. If you dip with engine hot and the correct fill method has been used it will always show slightly more than max.That is normal it should not be over max mark cold.
     
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  19. oakey

    oakey Well-Known Member

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    Thank you for all your replies. Very useful
    As I said before, I havent overfilled, was just a question thats been bothering me for ages
     
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  20. dubbleRR

    dubbleRR Well-Known Member

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    Then again has anyone calculated how much of an oil over fill is needed for the self under sealing system that is fitted on some land rovers........:eek::D:D:D:D......RR
     
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